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Author Question: Each kidney contains thousands of nephrons. Indicate whether the statement is true or ... (Read 24 times) |
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.